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There are a total of 515904 record(s) matching your query.
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El Nino and the Global Ocean Observing System
Author(s): Halpern, David
Abstract: Until a decade ago, an often-quoted expression in oceanography is that very few observations are recorded throughout the ocean. Now, the sentiment is no longer valid in the uppermost 10 of the tropical Pacific Ocean nor at ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1999
Added to NTRS: 2004-09-16
Document ID: 20000070375
Preliminary Admittance Estimates for the Valles Marineris, Mars
Author(s): Anderson, F. Scott; Banerdt, W. B.
Abstract: We use the gravity and topography fields derived from Mars Global Surveyor in conjunction with a multi-resolution localization admittance technique to constrain lithospheric structure for the trough system of Valles ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 2000
Added to NTRS: 2004-09-16
Document ID: 20000080641
Technologies for Icy Bodies Access
Author(s): Carsey, F. D.; Anderson, F. S.; French, L. C.; Green, J. R.; Jones, J. A.; Lane, A. L.; Leger, P. C.; Zimmerman, W. F.
Abstract: Recent events in planetary exploration have profoundly changed the way both space scientists and the public regard the solar system and our place in it. These events include the Galileo data suggesting subsurface oceans in ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 2001
Added to NTRS: 2004-09-16
Document ID: 20010041219
Iron Isotopic Diagnostics of Presolar Supernova Grains
Author(s): Clayton, D. D.; Meyer, B. S; The, L.-S.
Abstract: We study the abundance and isotopic composition of iron in a massive-star supernova to identify those isotopic characteristics that can identify the location of the condensing matter that is contained in the presolar ...
NASA Center: NASA (non Center Specific)
Publication Year: 2002
Added to NTRS: 2004-09-16
Document ID: 20020045568
Diverse Rock Types at the Mars Pathfinder Landing Site
Author(s): Murchie, Scott; Barnouin-Jha, Oliver; Johnson, Jeffrey; Bell, James F., III; McSween, Harry Y., Jr.; Morris, Richard
Abstract: We are analyzing Superpan data to assess diversity of rock types at Sagan Memorial Station (SMS). We have found that some rocks, which previously went unrecognized, exhibit infrared absorptions indicative of crystalline iron ...
NASA Center: Johnson Space Center
Publication Year: 2000
Added to NTRS: 2004-09-16
Document ID: 20000080677
The Opposition Effect: Laboratory Studies Compared to Theoretical Models
Author(s): Nelson, R. M.; Hapke, B. W.; Smythe, W. D.; Hale, A. S.; Piatek, J. L.
Abstract: Laboratory measurements of the reflectance phase curve, a measurement of great importance in understanding the texture of planetary regoliths, are not consistent with widely accepted theoretical models. Additional ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 2002
Added to NTRS: 2004-09-16
Document ID: 20020046342
Arecibo Radar Observations of Near-Earth Asteroids: A Study in Heterogeneity
Author(s): Nolan, M. C.; Howell, E. S.; Margot J.-L.; Ostro, S. J; Benner, L. A. M.; Giorgini, J. D.; Campbell, D. B.
Abstract: Characterization of the rotation state and structure of near-Earth asteroids through radar observations using the Arecibo and Goldstone planetary radar systems shows the remarkable variety of these objects, and suggests ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 2002
Added to NTRS: 2004-09-16
Document ID: 20020046549
Low Temperature Growth of Nanostructured Diamond Films on Metals
Author(s): Baker, Paul A.; Catledge, Shane A.; Vohra, Yogesh K.
Abstract: The field of nanocrystalline diamond and tetrahedral amorphous carbon films has been the focus of intense experimental activity in the last few years for applications in field emission display devices, optical windows, and ...
NASA Center: Goddard Space Flight Center
Publication Year: 2001
Added to NTRS: 2004-09-16
Document ID: 20010097445
Electric propulsion - Systems, flight mechanics, power source, and mission applications
Author(s): Stuhlinger, E.
Abstract: Electric propulsion systems and spacecraft power sources, flight mechanics, and mission applications
NASA Center: Marshall Space Flight Center
Publication Year: 1967
Added to NTRS: 2004-09-16
Accession Number: 68N12193; Document ID: 19680002725
MEEC, a MSP 2001 Rover Experiment to Measure Electrostatic Charging in the Martian Atmosphere
Author(s): Ferguson, D. C.; Hillard, G. B.
Abstract: The Mars Experiment on Electrostatic Charging (MEEC), to be flown on the MSP 2001 Marie Curie Rover, is described. It will measure absolute and relative levels of charging in the Martian atmosphere due to traverses and ...
NASA Center: Glenn Research Center
Publication Year: 2000
Added to NTRS: 2004-09-16
Document ID: 20000080751
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